Fluidic dispensing apparatus and fluid dispensing cartridge therefor

ABSTRACT

A fluid dispensing cartridge includes a housing body having a proximal end wall, a distal end wall, a fluid chamber, and a hollow throat portion. The fluid chamber is in fluid communication with the hollow throat portion, and the distal end wall provides a distal termination of the hollow throat portion. A fluid jetting chip is located on, and is attached to, the distal end wall. The hollow throat portion includes a fluid channel. The fluid channel has an interior wall that has a plurality of elongate protrusions.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is related to U.S. patent application Ser. No.16/286,060, filed Feb. 26, 2019.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to fluidic dispensing devices, and, moreparticularly, to a miniaturized fluidic dispensing apparatus having afluid dispensing cartridge.

2. Description of the Related Art

One type of fluid jetting cartridge is an ink jet cartridge for use withan ink jet printer, which includes a mechanism that scans the cartridgeover a print medium, such as paper. In such a design, the size of thenozzle array is enlarged to cover a swath height on the print medium.However, such an ink jet printer design is not suitable for a personalapplication of a fluid, such as in a medication dispenser (e.g., a nasalspray applicator) or a personal writing instrument (e.g., a handheld inkpen). In part, this is because the ink jet cartridge is not configuredto be hand-manipulated and controlled. In addition, for medicationdispensing applications, an ink jet cartridge is not suitable in size orconfiguration to be inserted into a small orifice of a person, such as anostril or ear canal.

What is needed in the art is a fluidic dispensing apparatus having afluid dispensing cartridge, which is configured to be hand-manipulatedand controlled, and is suitable in size and configuration for aparticular application for personal use.

SUMMARY OF THE INVENTION

The present invention provides a fluidic dispensing apparatus having afluid dispensing cartridge, which is configured to be hand-manipulatedand controlled, and is suitable in size and configuration for aparticular application for personal use.

The invention in one form is directed to a fluid dispensing cartridgethat includes a housing body having a proximal end wall, a distal endwall, a fluid chamber, and a hollow throat portion. The fluid chamber isin fluid communication with the hollow throat portion, and the distalend wall provides a distal termination of the hollow throat portion. Afluid jetting chip is located on, and is attached to, the distal endwall. The hollow throat portion includes a fluid channel. The fluidchannel has an interior wall that has a plurality of elongateprotrusions. In one embodiment, the elongate protrusions may extendlongitudinally in the fluid channel and project toward an interior ofthe fluid channel.

The invention in another form is directed to a fluid dispensingcartridge, which includes a housing body having a proximal end wall, adistal end wall, a fluid chamber, a hollow throat portion, and a centrallongitudinal axis. The fluid chamber is in fluid communication with thehollow throat portion, and the distal end wall provides a distaltermination of the hollow throat portion. A fluid jetting chip islocated on, and is attached to, the distal end wall. The fluid chamberhas a first cross-sectional area perpendicular to the centrallongitudinal axis and the hollow throat portion has a secondcross-sectional area perpendicular to the central longitudinal axis,wherein the first cross-sectional area is greater than the secondcross-sectional area.

The invention in another form is directed to a fluidic dispensingapparatus that includes a handle having a controller portion and acartridge housing. The cartridge housing is removably engaged with thecontroller portion. The cartridge housing has a distal opening. A fluiddispensing cartridge is positioned in the cartridge housing. The fluiddispensing cartridge has a hollow throat portion that extends distallythrough the distal opening. The hollow throat portion has a distal endwall that mounts a fluid jetting chip. The hollow throat portion has afluid channel that extends to the fluid jetting chip. The fluid channelhas an interior wall that has a plurality of elongate protrusions thatproject toward an interior of the fluid channel.

One advantage of the invention, in general, is that the fluidicdispensing apparatus having the fluid dispensing cartridge may behand-manipulated and controlled, with one hand, so as to position andoperate the jetting chip for jetting a fluid toward a target area.

Another advantage of the present invention, in a medicinal application,for example, is that a portion of the apparatus is sized and shaped tofit through a small orifice and into a small passageway, such as anostril or ear canal, so as to position the jetting chip as near thetarget area as possible.

BRIEF DESCRIPTION OF THE DRAWINGS

The above-mentioned and other features and advantages of this invention,and the manner of attaining them, will become more apparent and theinvention will be better understood by reference to the followingdescription of embodiments of the invention taken in conjunction withthe accompanying drawings, wherein:

FIG. 1 is a fluidic dispensing apparatus in accordance with anembodiment of the present invention.

FIG. 2 is an exploded predominantly rear perspective view of the fluidicdispensing apparatus of FIG. 1, depicting a hollow throat portion of thefluid dispensing cartridge having a fluid jetting chip and depicting anelectrical connection arrangement of the controller portion of thefluidic dispensing apparatus.

FIG. 3 is an exploded predominantly front perspective view of thefluidic dispensing apparatus of FIG. 1, depicting the hollow throatportion of the fluid dispensing cartridge and depicting a proximalelectrical connection arrangement of the fluid dispensing cartridge.

FIG. 4 is a side section view of the fluidic dispensing apparatus ofFIGS. 1-3 taken along plane 4-4 of FIG. 2.

FIG. 5 is a block diagram of a control circuit of the controller portionof the fluidic dispensing apparatus of FIG. 1.

FIG. 6A is an enlarged portion of the side section view of FIG. 4,showing in greater detail the hollow throat portion of the fluiddispensing cartridge of the fluidic dispensing apparatus of FIGS. 1-4.

FIG. 6B is a section of the section view of FIG. 6B, taken along line6B-6B of FIG. 6A, showing an axial view of the elongate protrusions inthe fluid channel of the hollow throat portion of the fluid dispensingcartridge.

FIG. 7A is an enlarged predominantly rear perspective view of thecartridge throat cover of the fluidic dispensing apparatus of FIGS. 1-4.

FIG. 7B is an enlarged predominantly front perspective view of thecartridge throat cover of FIG. 7A.

FIG. 8A is an enlarged predominantly rear perspective view of analternative cartridge throat cover for use with the fluid dispensingcartridge of the fluidic dispensing apparatus of FIGS. 1-4.

FIG. 8B is an enlarged predominantly front perspective view of thealternative cartridge throat cover of FIG. 8A.

FIG. 9 is a predominantly rear perspective view depicting an alternativeelectrical connection arrangement for the controller portion and thefluid dispensing cartridge of the fluidic dispensing apparatus of FIGS.1-4.

FIG. 10 is a predominantly front perspective view depicting thealternative electrical connection arrangement of the controller portionand the fluid dispensing cartridge of FIG. 9.

Corresponding reference characters indicate corresponding partsthroughout the several views. The exemplifications set out hereinillustrate embodiments of the invention, and such exemplifications arenot to be construed as limiting the scope of the invention in anymanner.

DETAILED DESCRIPTION OF THE INVENTION

Referring now to the drawings, and more particularly to FIGS. 1-4, thereis shown a fluidic dispensing apparatus 10, which includes a controllerportion 12, a cartridge housing 14, a fluid dispensing cartridge 16, anda cartridge throat cover 18 arranged along a longitudinal axis 20.Controller portion 12 and cartridge housing 14 in combination form ahandle 10-1 of fluidic dispensing apparatus 10. As shown in FIG. 1,cartridge housing 14 is removably engaged, i.e., connected, withcontroller portion 12. In the present invention, cartridge throat cover18 is optional.

Referring to FIGS. 2 and 4, controller portion 12 includes a controllerhousing 22, a control circuit 24, a battery 26, an actuator button 28,and a plurality of electrical contacts 30.

Controller housing 22 includes a cavity 22-1 that contains controlcircuit 24 and battery 26. In the present embodiment, an exterior ofcontroller housing 22 is generally cylindrical. Referring also to FIG.5, battery 26 is connected to control circuit 24, and in turn supplieselectrical power to all electrical components of control circuit 24, andto fluid dispensing cartridge 16 via control circuit 24.

As shown in FIGS. 2-4, in the present embodiment, controller housing 22has a coupling portion 22-2 and a distal end surface 22-3.

Coupling portion 22-2 is configured for detachable attachment to acorresponding portion of cartridge housing 14. Coupling portion 22-2 maybe, for example, radially opposed slots 32-1, 32-2 that rotationallyreceive a corresponding pair of radially opposed tabs 42-1, 42-2 ofcartridge housing 14. In the present embodiment, coupling portion 22-2of controller housing 22 is configured for quarter-turn detachableattachment to cartridge housing 14.

Referring to FIGS. 2 and 4, the plurality of electrical contacts 30 ofcontroller portion 12 is exposed at, and may alternatively project from,distal end surface 22-3 of controller housing 22.

Referring also to FIG. 5, control circuit 24 includes a processorcircuit 34, a memory circuit 36, and a driver circuit 38. Controlcircuit 24 may be formed as one or more Application Specific IntegratedCircuits (ASIC).

Processor circuit 34 may have one or more programmable microprocessorsand associated circuitry, such as an input/output interface, clock,buffers, memory, etc. Memory circuit 36 is communicatively coupled toprocessor circuit 34, e.g., via a bus circuit, and may include volatilememory circuits, such as random access memory (RAM), and non-volatilememory circuits, such as read only memory (ROM), electronically erasableprogrammable ROM (EEPROM), NOR flash memory, NAND flash memory, etc.

Processor circuit 34 of control circuit 24 is electrically connected tobattery 26, and is electrically and communicatively connected toactuator button 28, memory circuit 36, and driver circuit 38. Drivercircuit 38 is electrically connected to the plurality of electricalcontacts 30 of controller portion 12.

Processor circuit 34 of control circuit 24 is configured via softwareand/or firmware to operate fluid dispensing cartridge 16 (see also FIGS.1-4) for jetting a fluid contained in fluid dispensing cartridge 16. Inparticular, when a user depresses actuator button 28, actuator button 28supplies an input signal to processor circuit 34. In turn, processorcircuit 34 executes control signals to generate cartridge controlsignals. The cartridge control signals are supplied by processor circuit34 to driver circuit 38. Driver circuit 38 conditions the cartridgecontrol signals (e.g., through impedance matching, voltageamplification, current amplification, etc.) as needed to be compatiblewith the electrical requirements of fluid dispensing cartridge 16, andsupplies the conditioned cartridge control signals to respectiveelectrical contacts of the plurality of electrical contacts 30.

Control circuit 24 may also supply power and ground connections to fluiddispensing cartridge 16 via respective electrical contacts of theplurality of electrical contacts 30. The plurality of electricalcontacts 30 supply the conditioned cartridge control signals, and powerand ground, at a voltage level and/or current level suitable for theelectrical jetting circuitry of fluid dispensing cartridge 16.

Referring again to FIGS. 2-4, cartridge housing 14 includes a proximalend 14-1, a coupling portion 14-2, a distal end 14-3, a chamber 14-4, aproximal opening 14-5, a distal opening 14-6, and an interior taperedannular surface 14-7. Chamber 14-4 extends between proximal end 14-1 anddistal end 14-3 to define proximal opening 14-5 and distal opening 14-6.Each of chamber 14-4 and proximal opening 14-5 has a cross-sectionalarea, e.g., diameter, selected to axially receive fluid dispensingcartridge 16.

Interior tapered annular surface 14-7 is located a distance 40 fromproximal end 14-1. Interior tapered annular surface 14-7 generallytransitions longitudinally from the larger cross-sectional area, e.g.,diameter, of chamber 14-4 to the relatively smaller cross-sectionalarea, e.g., diameter, of distal opening 14-6. Interior tapered annularsurface 14-7 defines a stop within chamber 14-4 to limit an extent of alengthwise portion of fluid dispensing cartridge 16 that can be receivedin chamber 14-4. In operation, fluid dispensing cartridge 16 is axiallyreceived into chamber 14-4 of cartridge housing 14 to a depth defined byinterior tapered annular surface 14-7. Also, in the present embodiment,interior tapered annular surface 14-7 will tend to radially center fluiddispensing cartridge 16 on longitudinal axis 20.

Coupling portion 14-2 of cartridge housing 14 is configured fordetachable attachment to coupling portion 22-2 of controller housing 22.Coupling portion 14-2 may include, for example, the pair of radiallyopposed tabs 42-1, 42-2 that are sized and shaped to axially androtationally engage the radially opposed slots 32-1, 32-2 of controllerhousing 22. In the present embodiment, coupling portion 22-2 ofcontroller housing 22 is configured for quarter-turn detachableattachment to coupling portion 14-2 of cartridge housing 14. Each ofradially opposed tabs 42-1, 42-2 is inwardly-facing, i.e., extendstoward longitudinal axis 20.

Also referring to FIG. 1, when coupling portion 14-2 of cartridgehousing 14 is attached to coupling portion 22-2 of controller housing22, fluid dispensing cartridge 16 is in a state of compression betweendistal end surface 22-3 of controller housing 22 and interior taperedannular surface 14-7 of cartridge housing 14, such that fluid dispensingcartridge 16 is axially and radially restrained in chamber 14-4 ofcartridge housing 14. Stated differently, in the present embodiment,fluid dispensing cartridge 16 is axially and radially restrained influidic dispensing apparatus 10 by the combined effect of interiortapered annular surface 14-7 of cartridge housing 14 and distal endsurface 22-3 of controller housing 22.

Referring to FIGS. 2-4, fluid dispensing cartridge 16 includes a housingbody 44 having a proximal end wall 46, an intermediate wall 48, a distalend wall 50, and a central longitudinal axis 52. Housing body 44 is aunitary structure, and has an exterior surface 44-1. When fluiddispensing cartridge 16 is installed in handle 10-1, centrallongitudinal axis 52 of fluid dispensing cartridge 16 lies on, and iscoincident with, longitudinal axis 20 of fluidic dispensing apparatus10.

Proximal end wall 46 has a first surface area and distal end wall 50 hasa second surface area, wherein the first surface area of proximal endwall 46 is greater than the second surface area of distal end wall 50.Intermediate wall 48 is located between, and is spaced from, proximalend wall 46 and distal end wall 50 along central longitudinal axis 52. Abody region 54 between proximal end wall 46 and intermediate wall 48defines a fluid chamber 56. A body region 58 between intermediate wall48 and distal end wall 50 defines a hollow throat portion 60. Proximalend wall 46 provides a proximal termination of fluid chamber 56 anddistal end wall 50 provides a distal termination of hollow throatportion 60. As shown in FIG. 6A with respect to FIG. 4, intermediatewall 48 has an opening 48-1 that facilitates fluid communication betweenfluid chamber 56 and hollow throat portion 60.

To effect assembly of fluidic dispensing apparatus 10, as depicted inFIG. 1, from the unassembled state depicted in FIGS. 2-4, fluiddispensing cartridge 16 is positioned in cartridge housing 14, prior tocartridge housing 14 being connected to controller portion 12. Whenfluid dispensing cartridge 16 is installed in cartridge housing 14,hollow throat portion 60 of fluid dispensing cartridge 16 extendsdistally through distal opening 14-6 of cartridge housing 14. Cartridgehousing 14 is then connected to controller portion 12, which in turnestablishes electrical connections between controller portion 12 andfluid dispensing cartridge 16.

Fluid chamber 56 has a first cross-sectional area perpendicular tocentral longitudinal axis 52, and hollow throat portion 60 has a secondcross-sectional area perpendicular to the central longitudinal axis 52,wherein the first cross-sectional area is greater than the secondcross-sectional area throughout the longitudinal extent of each of fluidchamber 56 and hollow throat portion 60. In the present embodiment,fluid chamber 56 is cylindrical in shape. In the present embodiment, alongitudinal extent of each of fluid chamber 56 and hollow throatportion 60 is along the central longitudinal axis 52.

Referring to FIG. 6A with respect to FIG. 4, a filter member 62 islocated inside the housing body 44, and is positioned to cover opening48-1 in intermediate wall 48 to separate fluid chamber 56 from hollowthroat portion 60. Filter member 62 is porous, and in one embodiment isin the form of a mesh screen, e.g., a stainless steel mesh screen.Filter member 62 is connected to the intermediate wall 48, e.g., by heatstaking, welding, adhesive, etc.

An absorbent body 64, such as a foam or felt body, is located in andsubstantially fills fluid chamber 56. Absorbent body 64 contains a fluidthat is to be ejected, i.e., jetted, from fluid dispensing cartridge 16.

During assembly of fluid dispensing cartridge 16, filter member 62 andabsorbent body 64 are installed in fluid chamber 56, and thereafter,proximal end wall 46 (also sometimes referred to as a lid) of housingbody 44 is attached, e.g., ultrasonically welded, in sealing engagementto body region 54 of housing body 44.

Referring to FIGS. 2, 4, and 6A, fluid dispensing cartridge 16 includesa fluid jetting chip 66 that is located on, and is attached to, distalend wall 50 of housing body 44. In the present embodiment, alongitudinal extent of each of fluid chamber 56 and hollow throatportion 60 of housing body 44 is along the central longitudinal axis 52,and a center of each of fluid chamber 56, hollow throat portion 60, andfluid jetting chip 66 is located on central longitudinal axis 52.

Fluid jetting chip 66 is configured as a plate-like structure having aplanar extent formed generally as a nozzle plate layer and a siliconlayer, as is well known in the art. The nozzle plate layer of fluidjetting chip 66 includes a plurality of fluid jetting nozzles 66-1, suchas for example, two to twenty fluid jetting nozzles. Associated witheach of the plurality of fluid jetting nozzles 66-1, at the siliconlayer of fluid jetting chip 66, is an ejection mechanism, such as arespective electrical heater (thermal) or piezoelectric(electromechanical) device that is individually associated with arespective fluid jetting nozzle of the plurality of fluid jettingnozzles 66-1. The general operation of such a fluid jetting chip isknown in the micro-fluid ejection arts, such as in ink jet printing.

Referring also to FIG. 3, fluid dispensing cartridge 16 includes aplurality of electrical contacts 68 that is accessible at, and faceproximally from, e.g., project proximally from, proximal end wall 46 ofhousing body 44. In the present embodiment, each of a center of proximalend wall 46 from which the plurality of electrical contacts 68 faceproximally, and a center of fluid jetting chip 66 mounted to distal endwall 50, is located on central longitudinal axis 52.

The plurality of electrical contacts 68 are distributed on proximal endwall 46, with the plurality of electrical contacts 68 being spaced fromone another and electrically insulated from one another. In the presentembodiment, at least a portion of the plurality of electrical contacts68 is arranged in a circular pattern 68-1 at proximal end wall 46. It iscontemplated that a different circular distribution pattern of theplurality of electrical contacts 68 may be made in the form of aconcentric circular pattern. Also, it is contemplated that otherdistribution patterns, such as polygonal, may be used as an alternativeto the circular distribution pattern.

Referring to FIGS. 2-4, a circuit trace 70, such as a flexible tabcircuit having a plurality of insulated conductors, is electricallyconnected to the plurality of electrical contacts 68 that faceproximally from proximal end wall 46 of housing body 44, and iselectrically connected to the fluid jetting chip 66 at distal end wall50 of housing body 44, so as to establish electrical communicationbetween the plurality of electrical contacts 68 and the plurality ofjetting nozzles 66-1 of fluid jetting chip 66. As such, circuit trace 70extends from proximal end wall 46 to distal end wall 50 along exteriorsurface 44-1 of housing body 44. Circuit trace 70 lies on and followsthe contour of the longitudinal extent of exterior surface 44-1 ofhousing body 44, including body region 54 having fluid chamber 56 andbody region 58 having hollow throat portion 60. Circuit trace 70 isattached to exterior surface 44-1 of housing body 44, such as byadhesive or heat staking.

Referring to FIGS. 4, 6A and 6B, hollow throat portion 60 includes afluid channel 60-1 having a length that defines a separation distancebetween the fluid jetting chip 66 and the filter member 62. Stateddifferently, hollow throat portion 60 defines fluid channel 60-1 ashaving a length that, in part, defines a separation distance betweenfluid jetting chip 66 and the plurality of electrical contacts 68.

In some applications, the amount of fluid to be jetted dictates a largercontainer size for fluid chamber 56 of body region 54, but requires thatdistal end wall 50 and fluid jetting chip 66 have a relatively smallarea, and requires that hollow throat portion 60 have a lengthsufficient, so as to position fluid jetting chip 66 within an orifice(e.g., ear canal or nostril) at the desired application site. As in thepresent embodiment, hollow throat portion 60 of fluid dispensingcartridge 16 is extended in length and with distal end wall 50 beingmade only large enough to house and mount fluid jetting chip 66. This,however, increases the volume of fluid that is accumulated distal tofilter member 62, which is considered to be non-deliverable, and thuswasted, fluid. By adding ribs or other features internal to fluidchannel 60-1, i.e., the filter-to-jetting chip fluid path, the volume ofnon-deliverable fluid is reduced.

Accordingly, referring to FIGS. 6A and 6B, fluid channel 60-1 has aninterior wall 60-2 that has a plurality of elongate protrusions 60-3that project toward an interior of the fluid channel 60-1, e.g.,generally toward central longitudinal axis 52. In the presentembodiment, the plurality of elongate protrusions 60-3 is in the form ofa plurality of elongate ribs that extend longitudinally in fluid channel60-1. Also, as in the present embodiment, the plurality of elongateprotrusions 60-3 may extend proximally into opening 48-1 of intermediatewall 48.

A cross-section of fluid channel 60-1 tapers in a direction 71 fromfilter member 62 toward fluid jetting chip 66. In the presentembodiment, interior wall 60-2 of hollow throat portion 60 has afrustoconical shape with the plurality of elongate protrusions 60-3projecting toward an interior of fluid channel 60-1.

To effect assembly of fluidic dispensing apparatus 10, as depicted inFIG. 1, from the unassembled state depicted in FIG. 2, fluid dispensingcartridge 16 is positioned in cartridge housing 14, prior to cartridgehousing 14 being connected to controller portion 12. When fluiddispensing cartridge 16 is installed in cartridge housing 14, hollowthroat portion 60 of fluid dispensing cartridge 16 extends distallythrough distal opening 14-6 of cartridge housing 14. Cartridge housing14 is then connected to controller portion 12 to form handle 10-1, whichin turn establishes electrical connections between the plurality ofelectrical contacts 30 of controller portion 12 and the plurality ofelectrical contacts 68 of fluid dispensing cartridge 16.

Referring to FIGS. 1-4, optionally, fluid dispensing cartridge 16 mayinclude cartridge throat cover 18. In the present embodiment, cartridgethroat cover 18 may be installed on fluid dispensing cartridge 16 tocover hollow throat portion 60, either before or after fluid dispensingcartridge 16 is installed in handle 10-1, since the largest diameter ofcartridge throat cover 18 is smaller than the diameter of distal opening14-6 of cartridge housing 14.

Depending on the use application, cartridge throat cover 18 may beeither of a single use component, or a multiple use component. Forexample, in a medicinal delivery application, cartridge throat cover 18may be disposed of and replaced, such as for sanitary reasons.Alternatively, cartridge throat cover 18 may be removed and cleaned,such as by immersing cartridge throat cover 18 in a sanitizing solution,and then reinstalled.

Referring also to FIGS. 7A and 7B, cartridge throat cover 18 has a coverbody 72 having a first end 72-1, a second end 72-2, and an internalcavity 72-3 that extends between first end 72-1 and second end 72-2.First end 72-1 has a cover opening 72-4. Each of cover opening 72-4 offirst end 72-1 and internal cavity 72-3 has a size and shape thataccommodates hollow throat portion 60 of housing body 44. In otherwords, each of cover opening 72-4 and internal cavity 72-3 is sized andshaped to be removably received over hollow throat portion 60 of housingbody 44. Second end 72-2 of cover body 72 has a nozzle opening 72-5.

Cover body 72 includes mounting features 72-6, e.g., a recess forclearance to circuit trace 70, to establish a detachable connection withfluid dispensing cartridge 16 when cartridge throat cover 18 isinstalled over hollow throat portion 60 of housing body 44 of fluiddispensing cartridge 16.

Alternatively, it is contemplated that cartridge throat cover 18 may beformed integral with cartridge housing 14 as a single-piece component.In this alternative, depending on the use application, cartridge housing14 having cartridge throat cover 18 may be either of a single usecomponent, or a multiple use component. For example, in a medicinaldelivery application, cartridge housing 14 having cartridge throat cover18 may be disposed of and replaced, such as for sanitary reasons.Alternatively, cartridge housing 14 having cartridge throat cover 18 maybe removed and cleaned, such as by immersing cartridge housing 14 havingcartridge throat cover 18 in a sanitizing solution, and thenreinstalled.

FIGS. 8A and 8B depict another embodiment of a cartridge throat cover118 suitable for use with fluid dispensing cartridge 16, and is asubstitute for cartridge throat cover 18 depicted in FIGS. 1-4.Cartridge throat cover 118 has a cover body 172 having a first end172-1, a second end 172-2, and an internal cavity 172-3 that extendsbetween first end 172-1 and second end 172-2.

In the embodiment of FIGS. 8A and 8B, first end 172-1 includes anannular lip 172-4 that projects radially in a direction away fromcentral longitudinal axis 52. In addition, first end 172-1 of cartridgethroat cover 118 has a cover opening 172-5. Each of cover opening 172-5of first end 172-1 and internal cavity 172-3 has a size and shape thataccommodates hollow throat portion 60 of housing body 44 of fluiddispensing cartridge 16.

In the present embodiment, annular lip 172-4 serves as a mountingfeature. In particular, referring to FIGS. 2 and 4 in relation to FIGS.8A and 8B, annular lip 172-4 is sized and shaped so as to annularlyengage interior tapered annular surface 14-7 when cartridge throat cover118 is inserted into proximal opening 14-5 of cartridge housing 14. Assuch, in the embodiment of FIGS. 8A and 8B, cartridge throat cover 118is positioned over hollow throat portion 60 of fluid dispensingcartridge 16 prior to cartridge housing 14 being connected to controllerportion 12. In turn, annular lip 172-4 is wedged between interiortapered annular surface 14-7 of cartridge housing 14 and intermediatewall 48 of housing body 44 of fluid dispensing cartridge 16 whencartridge housing 14 is connected to controller portion 12.

Referring again to FIGS. 8A and 8B, cover body 172 has a nozzle portion172-6 that is proximal to second end 172-2. Nozzle portion 172-6 has anozzle opening 172-7 located at second end 172-2. In the presentembodiment, nozzle portion 172-6 is an angled nozzle portion thatpositions nozzle opening 172-7 to direct the jetted fluid from fluidjetting chip 66 of fluid dispensing cartridge 16 (see FIGS. 2 and 4) ina direction away from central longitudinal axis 52, and likewise, awayfrom longitudinal axis 20 of fluidic dispensing apparatus 10.

Thus, it can be seen that multiple types and configurations of thecartridge throat cover may be realized, so that customization of fluidicdispensing apparatus 10 is very easy and inexpensive, and accommodatesvarious use applications.

FIGS. 9 and 10 depict an alternative electrical connection of controllerportion 12 and fluid dispensing cartridge 16. In particular, theplurality of electrical contacts 30 of controller portion 12 and theplurality of electrical contacts 68 of fluid dispensing cartridge 16 maybe arranged to facilitate an edge connection, rather than an endconnection. In this embodiment, cartridge housing 14 and/or cartridgethroat covers 18, 118 may be optional.

In this alternative embodiment, a distal end portion 112 of controllerportion 12 includes a socket portion 114 that includes a parallelarrangement of the plurality of electrical contacts 30. Also, in thisalternative embodiment, fluid dispensing cartridge 16 is fitted with aproximal end wall 146 connected to body region 54, as a substitute forproximal end wall 46 of the previous embodiments. Proximal end wall 146has a mounting projection 148 that extends proximally from the proximalend wall 146. Mounting projection 148 is sized and shaped to be slidablyreceived in socket portion 114 of controller portion 12 in a snug fit.In the present embodiment, each of the mounting projection 148 and fluidjetting chip 66 is located on central longitudinal axis 52.

Referring to FIG. 10, mounting projection 148 defines a first projectionsurface 148-1 and a second projection surface 148-2. The plurality ofelectrical contacts 68 may extend longitudinally, e.g., in parallel,along at least one of the first projection surface 148-1 and secondprojection surface 148-2 for engagement with the plurality of electricalcontacts 30 of controller portion 12 when mounting projection 148 ofthis alternative embodiment of fluid dispensing cartridge 16 is slidablyreceived in mounting engagement with socket portion 114 of controllerportion 12.

As used herein, “substantially,” “generally,” and other words of degreeare relative modifiers intended to indicate permissible variation fromthe characteristic so modified.

While this invention has been described with respect to at least oneembodiment, the present invention can be further modified within thespirit and scope of this disclosure. This application is thereforeintended to cover any variations, uses, or adaptations of the inventionusing its general principles. Further, this application is intended tocover such departures from the present disclosure as come within knownor customary practice in the art to which this invention pertains andwhich fall within the limits of the appended claims.

What is claimed is:
 1. A fluid dispensing cartridge, comprising: a housing body having a proximal end wall, a distal end wall, a fluid chamber, and a hollow throat portion, the fluid chamber being in fluid communication with the hollow throat portion, and the distal end wall providing a distal termination of the hollow throat portion; a fluid jetting chip located on, and attached to, the distal end wall; and, wherein the hollow throat portion includes a fluid channel, the fluid channel having an interior wall that has a plurality of elongate protrusions.
 2. The fluid dispensing cartridge of claim 1, wherein the plurality of elongate protrusions are a plurality of elongate ribs that extend longitudinally in the fluid channel.
 3. The fluid dispensing cartridge of claim 1, comprising a filter member positioned to separate the fluid chamber from the hollow throat portion, and wherein a cross-section of the fluid channel tapers in a direction from the filter member toward the fluid jetting chip.
 4. The fluid dispensing cartridge of claim 1, wherein the housing body has an intermediate wall located between the proximal end wall and the distal end wall, wherein a region between the proximal end wall and the intermediate wall defines the fluid chamber, and a region between the intermediate wall and the distal end wall defines the hollow throat portion.
 5. The fluid dispensing cartridge of claim 4, comprising a filter member positioned to separate the fluid chamber from the hollow throat portion, the filter member being attached to the intermediate wall, the filter member being porous.
 6. The fluid dispensing cartridge of claim 1, comprising: a filter member located inside the housing body and positioned to separate the fluid chamber from the hollow throat portion, the filter member being porous; and an absorbent body located in the fluid chamber, the absorbent body containing a fluid.
 7. The fluid dispensing cartridge of claim 1, wherein the fluid chamber is cylindrical and the interior wall of the hollow throat portion has a frustoconical shape with the plurality of elongate protrusions projecting toward the interior of the fluid channel.
 8. The fluid dispensing cartridge of claim 7, wherein the fluid dispensing cartridge has a central longitudinal axis, with a longitudinal extent of each of the fluid chamber and the hollow throat portion being along the longitudinal axis, and a center of each of the fluid chamber, the hollow throat portion, and the fluid jetting chip being located on the central longitudinal axis.
 9. The fluid dispensing cartridge of claim 1, further comprising a cartridge throat cover having an internal cavity that is sized and shaped to be removably received over the hollow throat portion of the housing body.
 10. The fluid dispensing cartridge of claim 1, further comprising a cartridge throat cover having a cover body having a first end, a second end, and an internal cavity that extends between the first end and the second end, the first end having a cover opening, and each of the cover opening of the first end and the internal cavity having a size and shape that accommodates the hollow throat portion of the housing body, the second end having a nozzle opening.
 11. The fluid dispensing cartridge of claim 10, wherein the fluid dispensing cartridge has a central longitudinal axis, and wherein the cover body includes an angled nozzle portion.
 12. A fluid dispensing cartridge, comprising: a housing body having a proximal end wall, a distal end wall, a fluid chamber, a hollow throat portion, and a central longitudinal axis, the fluid chamber being in fluid communication with the hollow throat portion, and the distal end wall providing a distal termination of the hollow throat portion; a fluid jetting chip located on, and attached to, the distal end wall; and, wherein the fluid chamber has a first cross-sectional area perpendicular to the central longitudinal axis and the hollow throat portion has a second cross-sectional area perpendicular to the central longitudinal axis, the first cross-sectional area being greater than the second cross-sectional area.
 13. The fluid dispensing cartridge of claim 12, wherein the housing body includes an intermediate wall located between the proximal end wall and the distal end wall, wherein a region between the proximal end wall and the intermediate wall defines the fluid chamber, and a region between the intermediate wall and the distal end wall defines the hollow throat portion, the fluid chamber being in fluid communication with the hollow throat portion, the intermediate wall having an opening, and the fluid dispensing cartridge further comprising: a filter member positioned to cover the opening in the intermediate wall to separate the fluid chamber from the hollow throat portion, the filter member being connected to the intermediate wall, and the filter member being porous; an absorbent body located in the fluid chamber, the absorbent body containing a fluid; and a fluid channel in the hollow throat portion, the fluid channel having a length that defines a separation distance between the fluid jetting chip and the filter member, the fluid channel having an interior wall that has a plurality of elongate protrusions that project toward an interior of the fluid channel.
 14. The fluid dispensing cartridge of claim 13, wherein the plurality of elongate protrusions are a plurality of elongate ribs that extend longitudinally in the fluid channel.
 15. The fluid dispensing cartridge of claim 13, wherein a cross-section of the fluid channel tapers in a direction from the filter member toward the fluid jetting chip.
 16. The fluid dispensing cartridge of claim 13, wherein the fluid chamber is cylindrical and the interior wall of the hollow throat portion has a frustoconical shape with the plurality of elongate protrusions projecting toward an interior of the fluid channel.
 17. The fluid dispensing cartridge of claim 13, further comprising a cartridge throat cover having an internal cavity that is sized and shaped to be removably received over the hollow throat portion of the housing body.
 18. A fluidic dispensing apparatus, comprising: a handle having a controller portion and a cartridge housing, the cartridge housing being removably engaged with the controller portion, the cartridge housing having a distal opening; a fluid dispensing cartridge positioned in the cartridge housing, the fluid dispensing cartridge having a hollow throat portion that extends distally through the distal opening, the hollow throat portion having a distal end wall that mounts a fluid jetting chip, the hollow throat portion having a fluid channel that extends to the fluid jetting chip, the fluid channel having an interior wall that has a plurality of elongate protrusions that project toward an interior of the fluid channel.
 19. The fluidic dispensing apparatus of claim 18, wherein the plurality of elongate protrusions extend longitudinally in the fluid channel.
 20. The fluidic dispensing apparatus of claim 18, wherein a cross-section of the fluid channel tapers in a direction toward the fluid jetting chip. 